PRISMATIC CAMERAS DURING THE TOTAL ECLIPSE OP THE SUN. 717 
Nos. 4 and 5 were taken at a later phase and show semicircles corresponding to 
the principal hydrogen and calcium lines. 
Nos. 11 and 12 are photographs taken near mid-eclipse on isochromatic plates with 
exposures of 30 and 60 seconds respectively. Besides the arcs shown in Nos. 4 and 5 
a complete riug is seen on the less refrangible side of h corresponding to the 
1474 Kline. Still further towards the red are several bright points, marking the 
position of the Dg ring, but this and those of hydrogen and calcium differ from that 
of 1474 K in being made up of points, whilst the latter is nearly complete. The 
continuous spectrum is also very marked in these photographs, as it is also in others 
of long exposure. 
No. 18 was taken just before totality ended, and a large arc of the chromosphere is 
shown. 
